NPPES file of Aug 9, 2026

Andrew Thomas Assenmacher, M.D.

Sports Medicine (Orthopaedic Surgery) Physician · Monroe, MI

Andrew Thomas Assenmacher, M.D. is a sports medicine (orthopaedic surgery) physician with a practice address in Monroe, Michigan, and NPI 1578791240, issued on Jul 1, 2009. Check the license (Michigan 4301095012, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1578791240
Name
Andrew Thomas Assenmacher
Credential
M.D.
Primary taxonomy
Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
License numbers
4301095012 MI
35.129521 OH
Self-reported in NPPES; status is on the state search
Practice location
1420 N Monroe St, Monroe, MI 48162
Phone
(734) 240-8480
Enumerated
Jul 1, 2009
Record last updated
Jun 9, 2026
Fax
(734) 384-0469
Medicare enrollment
Enrolled (PECOS I20161116000292); accepts Medicare assignment
Medical or professional school
University Of Toledo College Of Medicine, 2009
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest sports medicine (orthopaedic surgery) physician records → All 58 in Michigan → Look up another NPI →

Also registered at 1420 N Monroe St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Abbas Bahari, M.D.Neurological Surgery Physician1447469176
  2. James Bitz, P.APhysician Assistant1841584521
  3. Kellyn Chapman, PA-CPhysician Assistant1881218360
  4. Anthony Melonakos, MDOrthopaedic Surgery Physician1679577621
  5. Jason Roberto, PA-C, ATCPhysician Assistant1215446158
  6. Rebecca StotzFamily Nurse Practitioner1386215200

Verify Andrew Thomas Assenmacher in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301095012    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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41% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024

170 Medicare Part D claims for 118 beneficiaries, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D. 116 claims were for opioids.

  1. Andrew Assenmacher170
  2. Specialty average288

Most prescribed

  1. Hydrocodone-Acetaminophen90 claims
  2. Meloxicam14 claims
  3. Celecoxib11 claims
  4. Cephalexin11 claims
  5. Tramadol Hcl11 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $568.20

7 payments; by number, the most common kind was food and beverage; the largest payer was Zimmer Biomet Holdings, Inc. The 2,400 providers of this specialty with any payment received $19,779.31 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Andrew Assenmacher$568
  2. Specialty average$19,779

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Promedica Central PhysiciansToledo, OH
  2. Promedica Monroe Physicians PLLCMonroe, MI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Andrew Thomas Assenmacher among 58 sports medicine (orthopaedic surgery) physician records in Michigan

Andrew Thomas Assenmacher, M.D. is one of 58 sports medicine (orthopaedic surgery) physician records with a practice address in Michigan. 93% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 66% of them.

  • NPI issued2009 · 66% of these records are older, 28% newer
  • In a Medicare fileYes · 93% of these records are
  • In the CMS Doctors and Clinicians fileYes · 90% of these records are
  • Graduated2009 · median 2003 among the 52 with a school on file
  • Record last updated2026 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0005X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sports Medicine (Orthopaedic Surgery) Physician providers in Michigan

There are 58 sports medicine (orthopaedic surgery) physician records in Michigan.

All 58 in Michigan → Every provider in Monroe → Sports Medicine (Orthopaedic Surgery) Physician nationwide →

The 8 sports medicine (orthopaedic surgery) physician records with the nearest ZIP codes

  1. Michael Brager, M.D.Livonia, MI 481541164497194
  2. Betina Hinckel, M.D.Taylor, MI 481801487107736
  3. Daniel Vogel, D.O.Brownstown, MI 481341760681852
  4. Kristopher Aalderink, M.D.Ypsilanti, MI 481971073721437
  5. Brian Borden, MDYpsilanti, MI 481971083615488
  6. Ryan Mlynarek, M.D.Ypsilanti, MI 481971235490756
  7. Manuel Schubert, MD, MSYpsilanti, MI 481971598176471
  8. Christopher McMellen, MDDearborn, MI 481241336702216

Common questions

What is Andrew Thomas Assenmacher, M.D.'s NPI number?

Andrew Thomas Assenmacher, M.D.'s National Provider Identifier (NPI) is 1578791240, issued on Jul 1, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Andrew Thomas Assenmacher, M.D. located?

The NPPES record lists a practice address at 1420 N Monroe St, Monroe, MI, 48162. Phone: (734) 240-8480. Providers update this record themselves, so call before visiting.

How can I verify Andrew Thomas Assenmacher, M.D.'s license?

NPPES lists Michigan license number 4301095012, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Andrew Thomas Assenmacher, M.D. prescribe under Medicare Part D?

In 2024, Andrew Thomas Assenmacher, M.D. had 170 Medicare Part D claims for 118 beneficiaries; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.